Bi-annual	US dollars
1987-06-30	16
1987-12-31	13
1988-06-30	10
1988-12-31	20
1989-06-30	17
1989-12-31	15
1990-06-30	12
1990-12-31	12
1991-06-30	10
1991-12-31	4
1992-06-30	4
1992-12-31	3
1993-06-30	3
1993-12-31	6
1994-06-30	63
1994-12-31	72
1995-06-30	46
1995-12-31	50
1996-06-30	14
1996-12-31	12
1997-06-30	12
1997-12-31	12
1998-06-30	2
1998-12-31	15
1999-06-30	2